package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WebSocketServer webSocketServer;
//    @Autowired
//    private UserMapper userMapper;
//    @Autowired
//    private WeChatPayUtil weChatPayUtil;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO 用户下单时传递的数据模型
     * @return 返回数据
     */
    @Transactional
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        // 1.处理各种业务异常
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            // 1.1地址簿为空
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 检查用户的收货地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        // 查询当前用户的购物车数据
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list == null || list.isEmpty()) {
            // 1.2购物车数据为空
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        // 2.向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getDetail());
        orders.setUserId(userId);

        orderMapper.insert(orders);
        // 3.向订单明细表插入n条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);

        // 4.清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(shoppingCart);

        // 5.封装VO返回结果
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO 用户支付时传递的数据模型
     * @return 支付模型
     */
    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) {
        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(),  //商户订单号
//                new BigDecimal("0.01"),         //支付金额，单位 元
//                "苍穹外卖订单",                       //商品描述
//                user.getOpenid()                    //微信用户的openid
//        );
//        Signature signature = Signature.getInstance("SHA256withRSA");

        // 生成空JSON，跳过微信支付流程
        JSONObject jsonObject = new JSONObject();

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo 订单状态
     */
    @Override
    public void paySuccess(String outTradeNo) {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);
        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payMethod(1)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

        // 通过WebSocket向客户端浏览器推送数据 type orderId content
        Map<Object, Object> map = new HashMap<>();
        map.put("type", 1); // 1表示来单提醒  2表示用户催单
        map.put("orderId", ordersDB.getId());   // 订单id
        map.put("content", "订单号：" + outTradeNo);

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 历史订单查询
     *
     * @param pageNum  页码
     * @param pageSize 每页数量
     * @param status   订单状态
     * @return 分页查询结果
     */
    @Override
    public PageResult pageQuery(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        long total = page.getTotal();

        List<OrderVO> list = new ArrayList<>();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (!page.isEmpty()) {
            for (Orders orders : page) {
                Long ordersId = orders.getId();
                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(ordersId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(total, list);
    }

    /**
     * 查询订单详情
     *
     * @param id 订单id
     * @return 查询结果
     */
    @Override
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        // 查询出订单明细，并封装入OrderVO
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id 订单id
     */
    @Override
    public void userCancelById(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 待付款和待接单状态下，用户可直接取消订单
        if (orders.getStatus() > 2) {
            // 其他情况下用户取消订单需电话沟通商家
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        if (Objects.equals(orders.getStatus(), Orders.TO_BE_CONFIRMED)) {
            // 订单处于待接单状态下取消，需要进行退款
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id 订单id
     */
    @Transactional
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();
        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(orderDetail -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(orderDetail, shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO 订单搜索时传递的数据模型
     * @return 搜索结果
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        // 设置分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);
        if (ordersPage == null || ordersPage.isEmpty()) {
            // 搜索内容为空，提示未找到相关订单
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        long total = ordersPage.getTotal();
        List<OrderVO> orderVOList = new ArrayList<>();
        // 查询出订单明细，并封装入OrderVO进行响应
        for (Orders orders : ordersPage) {
            Long ordersId = orders.getId();
            // 查询订单明细
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(ordersId);
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            orderVO.setOrderDetailList(orderDetailList);
            // 将订单菜品信息封装到orderVO中，并添加到orderVOList
            // 将每一个订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
            List<String> orderDishList = orderDetailList.stream().map(orderDetail ->
                    orderDetail.getName() + "*" + orderDetail.getNumber() + ";"
            ).collect(Collectors.toList());
            // 将该订单对应的所有菜品信息拼接在一起
            String orderDishes = String.join("", orderDishList);
            orderVO.setOrderDishes(orderDishes);
            orderVOList.add(orderVO);
        }
        return new PageResult(total, orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return 订单状态的数据模型
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送（已接单）、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        return OrderStatisticsVO.builder()
                .toBeConfirmed(toBeConfirmed)
                .confirmed(confirmed)
                .deliveryInProgress(deliveryInProgress)
                .build();
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO 接单时传递的数据模型
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders order = orderMapper.getById(ordersConfirmDTO.getId());
        if (order == null) throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        Orders orders = Orders.builder()
                .id(order.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO 拒单时传递的数据模型
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
        if (orders == null) throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (Objects.equals(orders.getStatus(), Orders.TO_BE_CONFIRMED)) {
            Orders orders1 = Orders.builder()
                    .id(orders.getId())
                    .status(Orders.CANCELLED)
                    .rejectionReason(ordersRejectionDTO.getRejectionReason())
                    .cancelTime(LocalDateTime.now())
                    .build();
            if (Objects.equals(orders.getPayStatus(), Orders.PAID)) {
                // 用户已支付，需要退款
                orders1.setPayStatus(Orders.REFUND);
            }
            orderMapper.update(orders1);
        } else {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO 取消订单时传递的数据模型
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());
        if (orders == null) throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        Orders orders1 = Orders.builder()
                .id(orders.getId())
                .status(Orders.CANCELLED)
                .cancelReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();
        if (Objects.equals(orders.getPayStatus(), Orders.PAID)) {
            // 用户已支付，需要退款
            orders1.setPayStatus(Orders.REFUND);
        }
        orderMapper.update(orders1);
    }

    /**
     * 派送订单
     *
     * @param id 订单id
     */
    @Override
    public void delivery(Long id) {
        Orders order = orderMapper.getById(id);
        if (order == null) throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        // 订单只有存在且状态为3（已接单/待派送）才可以执行派送操作
        if (Objects.equals(order.getStatus(), Orders.CONFIRMED)) {
            Orders orders = Orders.builder()
                    .id(id)
                    .status(Orders.DELIVERY_IN_PROGRESS)
                    .build();
            orderMapper.update(orders);
        } else {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    /**
     * 完成订单
     *
     * @param id 订单id
     */
    @Override
    public void complete(Long id) {
        Orders order = orderMapper.getById(id);
        if (order == null) throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        // 订单只有存在且状态为4（派送中）才可以完成
        if (Objects.equals(order.getStatus(), Orders.DELIVERY_IN_PROGRESS)) {
            Orders orders = Orders.builder()
                    .id(id)
                    .status(Orders.COMPLETED)
                    .deliveryTime(LocalDateTime.now())
                    .build();
            orderMapper.update(orders);
        } else {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    /**
     * 客户催单
     *
     * @param id 订单id
     */
    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null) throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        // 通过WebSocket向客户端浏览器推送数据 type orderId content
        Map<Object, Object> map = new HashMap<>();
        map.put("type", 2); // 1表示来单提醒  2表示用户催单
        map.put("orderId", id);   // 订单id
        map.put("content", "订单号：" + orders.getNumber());

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     *
     * @param address 客户的收货地址
     */
    private void checkOutOfRange(String address) {
        Map<String, String> map = new HashMap<>();
        map.put("address", shopAddress);
        map.put("output", "json");
        map.put("ak", ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address", address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin", shopLngLat);
        map.put("destination", userLngLat);
        map.put("steps_info", "0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if (distance > 15000) {
            //配送距离超过15000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
